Versatile rail mount for Streamlight Sidewinder Stalk Arc flashlight; Durable construction with high impact nylon polymer and stainless steel hardware; Hook and loop adapter plate; Durable construction with high impact nylon polymer and stainless steel hardware; Easy to install and remove with no tools required; Allows for handsfree use of flashlight in various applications; Compatible with MIL-STD-1913 and Picatinny rails